<template>
  <view v-if="goods_info.goods_name" class="goods-detail-container">
    <!-- 轮播图区域 -->
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
      <swiper-item v-for="(item,i) in goods_info.pics" :key="i">
        <image :src="item.pics_big" @click="preview(i)"></image>
      </swiper-item>
    </swiper>
      <!-- 商品信息区域 -->
      <view class="goods-info-box">
        <!-- 商品价格 -->
        <view class="price">¥{{goods_info.goods_price}}</view>
        <!-- 信息主题区域 -->
        <view class="goods-info-body">
          <!-- 商品名称 -->
          <view class="goods-name">{{goods_info.goods_name}}</view>
          <!-- 收藏 -->
          <view class="favi">
            <uni-icons type="star" size="18" color="gray"></uni-icons>
            <text>收藏</text>
          </view>
        </view>
        <!-- 运费 -->
        <view class="yf">快递：免运费 </view>
      </view>
      <!-- 商品详情信息-->
      <rich-text :nodes="goods_info.goods_introduce"></rich-text>
      <!-- 商品导航组件 -->
      <view class="goods_nav">
        <uni-goods-nav :options="options" :fill="true" :button-group="buttonGroup" @click="onClick" @buttonClick="buttonClick" />
      </view>
  </view>
</template>

<script>
  //从 vuex 中按需导出 mapState 辅助方法
  import { mapState, mapMutations,mapGetters } from 'vuex'
  export default {
    computed: {
      ...mapState('m_cart', []),
      ...mapGetters('m_cart', ['total'])
    },
    watch: {
      total: {
       handler(newVal) {
        const findResult = this.options.find((x) => x.text === '购物车')
        if(findResult) {
          findResult.info = newVal
        }
        },
        immediate: true
      }
    },
    data() {
      return {
        //商品详情对象
        goods_info: {},
        options: [ {
        					icon: 'shop',
        					text: '店铺',
        					infoBackgroundColor: '#007aff',
        					infoColor: "#f5f5f5"
        				}, {
        					icon: 'cart',
        					text: '购物车',
        					info: 0
        				}],
        				buttonGroup: [{
        						text: '加入购物车',
        						backgroundColor: 'linear-gradient(90deg, #FFCD1E, #FF8A18)',
        						color: '#fff'
        					},
        					{
        						text: '立即购买',
        						backgroundColor: 'linear-gradient(90deg, #FE6035, #EF1224)',
        						color: '#fff'
        					}
        				]
        
      };
    },
    onLoad(options) {
      //获取商品Id
      const goods_id = options.goods_id
      //调用请求商品详情数据的方法
      this.getGoodsDetail(goods_id)
    },
    methods: {
     async getGoodsDetail(goods_id) {
        const {data: res} = await uni.$http.get('https://api-hmugo-web.itheima.net/api/public/v1/goods/detail',{ goods_id})
        if(res.meta.status !== 200) return uni.$showMsg()
        //使用字符串的 replace() 方法，为img 标签添加行内的 style 样式，解决图片底部空白间隙的问题
        res.message.goods_introduce = res.message.goods_introduce.replace(/<img/g, '<img style="display:block;"').replace(/webp/g, 'jpg')
        this.goods_info = res.message
      },
      preview(i) {
        uni.previewImage({
          current: i,
          urls: this.goods_info.pics.map(x => x.pics_big)
        })
      },
      onClick(e) {
       if(e.content.text === '购物车') {
         uni.switchTab({
           url:'/pages/cart/cart'
         })
       }
      },
      //把 m_cart 模块中的 addToCart 方法映射到当前页面使用
      ...mapMutations('m_cart', ['addToCart']),
      buttonClick(e) {
        if(e.content.text === '加入购物车') {
          //组织一个商品的信息对象
          const goods = {
            goods_id: this.goods_info.goods_id,
            goods_name: this.goods_info.goods_name,
            goods_price: this.goods_info.goods_price,
            goods_count: 1,
            goods_small_logo: this.goods_info.goods_small_logo,
            goods_state: true             //商品的勾选状态
       
          }
          this.addToCart(goods)
        }
      }
    }
    
  }
</script>

<style lang="scss">
    swiper {
      height: 750rpx;
      image {
        width: 100%;
        height: 100%;
      }
    }
    .goods-info-box {
      padding: 10px;
      padding-right: 0;
      .price {
        color: #c00000;
        font-size: 18px;
        margin: 10px 0;
      }
      .goods-info-body {
        display: flex;
        justify-content: space-between;
        .goods-name {
          fony-size: 13px;
          padding-right: 10px;
        }
        .favi {
          width: 120px;
          font-size: 12px;
          display: flex;
          flex-direction: column;
          justify-content: center;
          align-items: center;
          border-left: 1px solid #efefef;
          color: gray;
        }
      }
      .yf {
        margin: 10px 0;
        font-size: 12px;
        color: gray;
      }
    }
    .goods_nav {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
    }
    .goods-detail-container {
      padding-bottom: 50px;
    }
</style>
